is 2 1846939 - 1
has 555985 decimal digits
takes 0.100 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L424C1A094A2CD697double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26832.272269.1176%18469391846939000.92898.0340%33.201271.5987%2.4811%
PrimeNet2570.010463.1579%90001600000.00143.0222%0.011864.2713%1.1134%
GPU722610.166365.5738%90001500000.00131.6304%0.167666.1351%0.5613%
Difference+7+32.1059+3.5439%+1837939+184543900+0.9276+6.4036%+33.0335+5.4637%+5.4637%

Known prime factors (1 factor, 75.4 bits, 0.00408488% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1846939514351267666290828716332375.44513924424890759544
23 × 7 × 1193 × 208424513393
2020-08-1111932084245133936,980.4893.261,668.4

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-01-01T17:43:00markrtiny2750006000000---0.046--3.531%
2015-10-06T22:10:01Bruno Victal5820K-linux5000001500000012---0.101--4.605%
2016-10-27T15:20:24Jocelyn Larouchelow 4M720000720000---0.057--2.073%
2016-10-29T20:53:43Jocelyn Larouchelow 4M864000864000---0.068--2.231%
2017-01-12T03:16:23Jocelyn Larouchelow 4M10368001036800---0.082--2.396%
2017-02-07T02:58:35Jocelyn Larouchelow 4M12441601244160012---0.146--4.875%
2018-02-02T20:26:27Jocelyn Larouchelow 4M18469392488320012---0.244--5.780%
2018-02-09T20:02:40Jocelyn Larouchelow 4M18469394976640012---0.351--6.552%
2018-02-24T11:25:45Jocelyn Larouchelow 4M18469399953280012---0.564--7.332%
2018-09-21T16:51:30Jocelyn Larouchelow 4M184693918469390012---0.929--8.034%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-16T00:00:00ANONYMOUSv4_computers21258--0.021--
2016-02-23T16:28:54Mark RoseManual testing258260--0.062--
2010-04-09T00:10:00Architects CubedManual testing260261--0.083--
2016-02-23T16:28:54Mark RoseManual testing261262--0.166--
2011-01-21T16:11:00GrunwalderGIMPManual testing21263--0.864--
2016-02-23T16:28:54Mark RoseManual testing262263--0.532--
2015-04-27T22:53:00snme2pm1Manual testing263264--1.063--
2015-04-27T22:53:00snme2pm1Manual testing264265--2.023--
2015-09-07T08:31:00ramgeisManual testing265266--4.046--
2017-10-20T14:50:26TJAOIManual testing266267--8.092--
2019-06-17T12:14:59TJAOIManual testing267268--16.18--


ECM factoring results:

Old Calculation Method

Total ECM effort:18.210 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:18.210 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.3130.025%
25500000.75247.137%
302500000.04695.465%
3510000000.00299.787%


ECM Summary

B1B2factorcurvesGHz-days
50000500000015310.58
50000500000010.069
500006600000977.562


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-07-16T04:00:00MadPooManual testing424C1A094A2CD6970.100


PRP results:
dateuseridcompidcofactorsres64PRP
2020-08-11T22:34:58storm55103570_Ivy_Bridge
51435126766629082871633
FCCD333A8D86D7__no
2020-11-11T15:45:41Oliver KruseIOS-5
51435126766629082871633
FCCD333A8D86D7E3no


P-1 factor-bounds graph:
B1 = 1846939, B2 = 184693900 (P-1 stage 2)
B1 = 1846939, B2 = 99532800 (P-1 stage 2)
B1 = 1846939, B2 = 49766400 (P-1 stage 2)
B1 = 1846939, B2 = 24883200 (P-1 stage 2)
B1 = 1244160, B2 = 12441600 (P-1 stage 2)
B1 = 1846939 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 1244160 (P-1 stage 1)
B1 = 1036800 (P-1 stage 1)
B1 = 864000 (P-1 stage 1)
B1 = 720000 (P-1 stage 1)
B1 = 275000, B2 = 6000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 275000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-07-09T11:24:35+00:00